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Method for dewatering and stabilizing treatment of sludge

A technology for stabilization treatment and sludge dewatering, applied in sludge treatment, water/sludge/sewage treatment, dehydration/drying/thickened sludge treatment, etc. Requirements for buried operations, poor stabilization effect, etc., to achieve the effects of reduced moisture content, improved viscosity, and improved bonding characteristics

Active Publication Date: 2010-12-22
GUANGDONG DAZHONG AGRI SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Usually, there are following problems in the further treatment or utilization of these sludges: due to the activities of microorganisms in the sludge, the odor is severe during storage and transportation; in addition, due to the sticky and viscous The knot characteristics make it neither easy to stack, handle and transport, nor meet the requirements of landfill operations in landfills
However, the heating and drying treatment also consumes a lot of energy and is expensive, and the stabilization effect is still not good

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A method for sludge dewatering and stabilization treatment, which comprises the following steps:

[0021] a. The sludge enters the plate and frame filter press for dehydration through the sludge pump, and the moisture content of the sludge is 50%;

[0022] b. Add 100kg of biomass coke to 1000kg of sludge with a moisture content of 70%, and stir evenly to obtain a sludge with a moisture content of about 64%.

[0023] Among them, biomass coke is a solid material whose main component is carbon, which is decomposed under 400 degrees Celsius and anaerobic conditions.

Embodiment 2

[0025] A method for sludge dewatering and stabilization treatment, which comprises the following steps:

[0026] a. The sludge enters the centrifugal filter press through the sludge pump for dehydration, and the moisture content of the sludge is 60%;

[0027] b. Add 300kg of biomass coke to 1000kg of sludge with a moisture content of 75% and stir evenly to obtain a sludge with a moisture content of about 58%. This moisture content is suitable for microbial fermentation and can be directly composted to prepare fertilizer.

[0028] Among them, biomass coke is a solid material whose main component is carbon, which is formed by decomposing sludge at 500 degrees Celsius and under anaerobic conditions.

Embodiment 3

[0030] A method for sludge dewatering and stabilization treatment, which comprises the following steps:

[0031] a. The sludge enters the plate and frame filter press for dehydration through the sludge pump, and the moisture content of the sludge is 70%;

[0032] b. Add 400kg of biomass coke to 1000kg of sludge with a moisture content of 76% and stir evenly to obtain a sludge with a moisture content of about 55%. This moisture content is suitable for microbial fermentation and can be directly composted to prepare fertilizer.

[0033] Among them, biomass coke is a solid material whose main component is carbon, which is formed by decomposing paper sludge at 600 degrees Celsius and anaerobic conditions.

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Abstract

The invention belongs to the technical field of sludge treatment, and in particular relates to a method for the dewatering and stabilization treatment of sludge. The method comprises the following steps of: (a) dewatering sludge and controlling the water content of the sludge below 80 percent; and (b) adding biomass coke to the dewatered sludge and evenly stirring. The biomass coke added in the invention has a cellular structure which can absorb solid particles in the sludge, therefore, the sludge forms a stable system, is improved in the aspects of hardness, viscous and adhesive characteristics, and the like and easy to store, load, unload and transport and can satisfy the requirement on sanitary landfill and the requirement on spontaneous combustion in incineration treatment. In the aspect of recycling the sludge, due to the cellular structure of the biomass coke, the sludge after the stabilizing treatment has good permeability, can rapidly lower the natural airing water content and greatly decrease energy consumption for re-drying.

Description

technical field [0001] The invention belongs to the technical field of sludge treatment, and in particular relates to a method for sludge dewatering and stabilization treatment. Background technique [0002] Sludge treatment is a new problem in the process of sewage treatment. Generally speaking, the water content of sludge produced by sewage treatment plants is still between 70% and 80% after mechanical dehydration treatment. There are usually the following problems in the further treatment or utilization of these sludges: due to the activity of microorganisms in the sludge, the odor is serious during storage and transportation; in addition, due to the viscosity and stickiness of this type of sludge The junction characteristics make it neither easy to stack, handle and transport, nor meet the requirements of landfill operations in landfills. However, if the sludge is sent to waste incineration plants, centralized sludge incineration plants, power plants or cement plants fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/00C02F11/12C05F7/00
CPCY02A40/20
Inventor 林小明
Owner GUANGDONG DAZHONG AGRI SCI CO LTD
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